Damcava35/set version (#257)

* feat: add "--set-version" option

This feature will allow to chose a specific cis version to run, like debian 11 or debian 12

* chore: configure current repository as a version

And use it as default version.

To this end, the scripts in bin/hardening have been made generic by removing the associated recommendation number.
Only impact is if you are used to execute scripts directly from bin/hardening.
In this case, please use the "bin/hardening.sh" wrapper as intended.

I had to rename 2.3.1_disable_nis.sh to uninstall_nis.sh, as it was conflicting with 2.3.1_disable_nis.sh

Also, there was a doublon between 1.1.1.8_disable_cramfs.sh and 99.1.1.1_disable_cramfs.sh ; the former was kept

* chore: remove CIS recommendation numbers from bin/hardening scripts

* fix: some tests are failing

find_ungrouped_files.sh and find_unowned_files.sh tests can not be executed multiple times:
- test repository is not cleaned
- configuration is updated multiple times

Those tests are also failing, because:
- the sed to change the status in the configuration was also changing the test folder path.
- missing /proc in EXCLUDED paths
- the EXCLUDED configuration doesn't have the correct format for egrep

---------

Co-authored-by: Damien Cavagnini <damien.cavagnini@corp.ovh.com>

bin/hardening/find_0_uid_non_root_account.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# CIS Debian Hardening
+#
+
+#
+# Ensure root is the only UID 0 account (Scored)
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+# shellcheck disable=2034
+HARDENING_LEVEL=2
+# shellcheck disable=2034
+# shellcheck disable=2034
+DESCRIPTION="Verify root is the only UID 0 account."
+EXCEPTIONS=""
+
+FILE='/etc/passwd'
+RESULT=''
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    info "Checking if accounts have uid 0"
+    RESULT=$(awk -F: '($3 == 0 && $1!="root" ) { print $1 }' "$FILE")
+    FOUND_EXCEPTIONS=""
+    for ACCOUNT in $RESULT; do
+        debug "Account : $ACCOUNT"
+        debug "Exceptions : $EXCEPTIONS"
+        debug "echo \"$EXCEPTIONS\" | grep -qw $ACCOUNT"
+        if echo "$EXCEPTIONS" | grep -qw "$ACCOUNT"; then
+            debug "$ACCOUNT is confirmed as an exception"
+            # shellcheck disable=SC2001
+            RESULT=$(sed "s!$ACCOUNT!!" <<<"$RESULT")
+            FOUND_EXCEPTIONS="$FOUND_EXCEPTIONS $ACCOUNT"
+        else
+            debug "$ACCOUNT not found in exceptions"
+        fi
+    done
+    if [ -n "$RESULT" ]; then
+        crit "Some accounts have uid 0: $(tr '\n' ' ' <<<"$RESULT")"
+    else
+        ok "No account with uid 0 appart from root ${FOUND_EXCEPTIONS:+and configured exceptions:}$FOUND_EXCEPTIONS"
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    info "Removing accounts with uid 0 may seriously harm your system, report only here"
+}
+
+# This function will create the config file for this check with default values
+create_config() {
+    cat <<EOF
+status=audit
+# Put here valid accounts with uid 0 separated by spaces
+EXCEPTIONS=""
+EOF
+}
+
+# This function will check config parameters required
+check_config() {
+    if [ -z "$EXCEPTIONS" ]; then
+        EXCEPTIONS="@"
+    fi
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_LIB_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_LIB_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "${CIS_LIB_DIR}"/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
+    exit 128
+fi